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For a $5 donation to his ballot measure to strengthen gun control laws in California, supporters can be entered into a drawing to win tickets to the big game in Santa Clara next month.

As of Tuesday, 1,704 people “liked” that.

Drawings for giveaways – often including face-to-face meetings with candidates – are a growing part of political campaigns, especially attractive to low-dollar donors who have few other ways to get personal attention.

For political campaigns, these contests are valuable less for the money raised than for the opportunity to increase a campaign’s social media footprint and to grow its fundraising lists.

Dan Newman, a Newsom spokesman, described the effort as a way in which Newsom is “creatively engaging supporters.”